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<h1>osc_patternmatch.c</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*********************************************************************************</span>
<a name="l00002"></a>00002 <span class="comment"></span>
<a name="l00003"></a>00003 <span class="comment"> Copyright 2006 MakingThings</span>
<a name="l00004"></a>00004 <span class="comment"></span>
<a name="l00005"></a>00005 <span class="comment"> Licensed under the Apache License, </span>
<a name="l00006"></a>00006 <span class="comment"> Version 2.0 (the "License"); you may not use this file except in compliance </span>
<a name="l00007"></a>00007 <span class="comment"> with the License. You may obtain a copy of the License at</span>
<a name="l00008"></a>00008 <span class="comment"></span>
<a name="l00009"></a>00009 <span class="comment"> http://www.apache.org/licenses/LICENSE-2.0 </span>
<a name="l00010"></a>00010 <span class="comment"> </span>
<a name="l00011"></a>00011 <span class="comment"> Unless required by applicable law or agreed to in writing, software distributed</span>
<a name="l00012"></a>00012 <span class="comment"> under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR</span>
<a name="l00013"></a>00013 <span class="comment"> CONDITIONS OF ANY KIND, either express or implied. See the License for</span>
<a name="l00014"></a>00014 <span class="comment"> the specific language governing permissions and limitations under the License.</span>
<a name="l00015"></a>00015 <span class="comment"></span>
<a name="l00016"></a>00016 <span class="comment">*********************************************************************************/</span>
<a name="l00017"></a>00017 
<a name="l00018"></a>00018 <span class="comment">/*</span>
<a name="l00019"></a>00019 <span class="comment">    osc_patternmatch.c</span>
<a name="l00020"></a>00020 <span class="comment"></span>
<a name="l00021"></a>00021 <span class="comment">    Adapted from OSC-pattern-match.c, by Matt Wright </span>
<a name="l00022"></a>00022 <span class="comment">    Adapted from oscpattern.c, by Matt Wright and Amar Chaudhury</span>
<a name="l00023"></a>00023 <span class="comment"> */</span>
<a name="l00024"></a>00024 
<a name="l00025"></a>00025 <span class="preprocessor">#include "types.h"</span>
<a name="l00026"></a>00026 <span class="preprocessor">#include "osc.h"</span>
<a name="l00027"></a>00027 
<a name="l00028"></a>00028 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">char</span> *theWholePattern; <span class="comment">/* Just for warning messages */</span>
<a name="l00029"></a>00029 
<a name="l00030"></a>00030 <span class="keyword">static</span> <span class="keywordtype">bool</span> MatchBrackets (<span class="keyword">const</span> <span class="keywordtype">char</span> *pattern, <span class="keyword">const</span> <span class="keywordtype">char</span> *test);
<a name="l00031"></a>00031 <span class="keyword">static</span> <span class="keywordtype">bool</span> MatchList (<span class="keyword">const</span> <span class="keywordtype">char</span> *pattern, <span class="keyword">const</span> <span class="keywordtype">char</span> *test);
<a name="l00032"></a>00032 
<a name="l00033"></a>00033 <span class="keywordtype">bool</span> Osc_PatternMatch(<span class="keyword">const</span> <span class="keywordtype">char</span> *  pattern, <span class="keyword">const</span> <span class="keywordtype">char</span> * test) 
<a name="l00034"></a>00034 {
<a name="l00035"></a>00035   theWholePattern = pattern;
<a name="l00036"></a>00036   
<a name="l00037"></a>00037   <span class="keywordflow">if</span> (pattern == 0 || pattern[0] == 0) 
<a name="l00038"></a>00038   {
<a name="l00039"></a>00039     <span class="keywordflow">return</span> test[0] == 0;
<a name="l00040"></a>00040   } 
<a name="l00041"></a>00041   
<a name="l00042"></a>00042   <span class="keywordflow">if</span> (test[0] == 0)
<a name="l00043"></a>00043   {
<a name="l00044"></a>00044     <span class="keywordflow">if</span> (pattern[0] == <span class="charliteral">'*'</span>)
<a name="l00045"></a>00045       <span class="keywordflow">return</span> Osc_PatternMatch(pattern+1,test);
<a name="l00046"></a>00046     <span class="keywordflow">else</span>
<a name="l00047"></a>00047       <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00048"></a>00048   }
<a name="l00049"></a>00049 
<a name="l00050"></a>00050   <span class="keywordflow">switch</span> (pattern[0]) 
<a name="l00051"></a>00051   {
<a name="l00052"></a>00052     <span class="keywordflow">case</span> 0: 
<a name="l00053"></a>00053       <span class="keywordflow">return</span> test[0] == 0;
<a name="l00054"></a>00054     <span class="keywordflow">case</span> <span class="charliteral">'?'</span>: 
<a name="l00055"></a>00055       <span class="keywordflow">return</span> Osc_PatternMatch(pattern + 1, test + 1);
<a name="l00056"></a>00056     <span class="keywordflow">case</span> <span class="charliteral">'*'</span>: 
<a name="l00057"></a>00057       <span class="keywordflow">if</span> (Osc_PatternMatch(pattern+1, test)) 
<a name="l00058"></a>00058         <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00059"></a>00059       <span class="keywordflow">else</span> 
<a name="l00060"></a>00060         <span class="keywordflow">return</span> Osc_PatternMatch(pattern, test+1);
<a name="l00061"></a>00061     <span class="keywordflow">case</span> <span class="charliteral">']'</span>:
<a name="l00062"></a>00062     <span class="keywordflow">case</span> <span class="charliteral">'}'</span>:
<a name="l00063"></a>00063       <span class="comment">// OSCWarning("Spurious %c in pattern \".../%s/...\"",pattern[0], theWholePattern);</span>
<a name="l00064"></a>00064       <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00065"></a>00065     <span class="keywordflow">case</span> <span class="charliteral">'['</span>:
<a name="l00066"></a>00066       <span class="keywordflow">return</span> MatchBrackets (pattern,test);
<a name="l00067"></a>00067     <span class="keywordflow">case</span> <span class="charliteral">'{'</span>:
<a name="l00068"></a>00068       <span class="keywordflow">return</span> MatchList (pattern,test);
<a name="l00069"></a>00069     <span class="keywordflow">case</span> <span class="charliteral">'\\'</span>:  
<a name="l00070"></a>00070       <span class="keywordflow">if</span> (pattern[1] == 0) 
<a name="l00071"></a>00071         <span class="keywordflow">return</span> test[0] == 0;
<a name="l00072"></a>00072       <span class="keywordflow">else</span> 
<a name="l00073"></a>00073       {
<a name="l00074"></a>00074         <span class="keywordflow">if</span> (pattern[1] == test[0]) 
<a name="l00075"></a>00075           <span class="keywordflow">return</span> Osc_PatternMatch(pattern+2,test+1);
<a name="l00076"></a>00076         <span class="keywordflow">else</span> 
<a name="l00077"></a>00077           <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00078"></a>00078       }
<a name="l00079"></a>00079     <span class="keywordflow">default</span>:
<a name="l00080"></a>00080       <span class="keywordflow">if</span> (pattern[0] == test[0]) 
<a name="l00081"></a>00081         <span class="keywordflow">return</span> Osc_PatternMatch(pattern+1,test+1);
<a name="l00082"></a>00082       <span class="keywordflow">else</span> 
<a name="l00083"></a>00083         <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00084"></a>00084   }
<a name="l00085"></a>00085 }
<a name="l00086"></a>00086 
<a name="l00087"></a>00087 
<a name="l00088"></a>00088 <span class="comment">/* we know that pattern[0] == '[' and test[0] != 0 */</span>
<a name="l00089"></a>00089 
<a name="l00090"></a>00090 <span class="keyword">static</span> <span class="keywordtype">bool</span> MatchBrackets (<span class="keyword">const</span> <span class="keywordtype">char</span> *pattern, <span class="keyword">const</span> <span class="keywordtype">char</span> *test) 
<a name="l00091"></a>00091 {
<a name="l00092"></a>00092   <span class="keywordtype">bool</span> result;
<a name="l00093"></a>00093   <span class="keywordtype">bool</span> negated = <span class="keyword">false</span>;
<a name="l00094"></a>00094   <span class="keyword">const</span> <span class="keywordtype">char</span> *p = pattern;
<a name="l00095"></a>00095 
<a name="l00096"></a>00096   <span class="keywordflow">if</span> (pattern[1] == 0) 
<a name="l00097"></a>00097   {
<a name="l00098"></a>00098     <span class="comment">// OSCWarning("Unterminated [ in pattern \".../%s/...\"", theWholePattern);</span>
<a name="l00099"></a>00099     <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00100"></a>00100   }
<a name="l00101"></a>00101 
<a name="l00102"></a>00102   <span class="keywordflow">if</span> (pattern[1] == <span class="charliteral">'!'</span>) 
<a name="l00103"></a>00103   {
<a name="l00104"></a>00104     negated = <span class="keyword">true</span>;
<a name="l00105"></a>00105     p++;
<a name="l00106"></a>00106   }
<a name="l00107"></a>00107 
<a name="l00108"></a>00108   <span class="keywordflow">while</span> (*p != <span class="charliteral">']'</span>) 
<a name="l00109"></a>00109   {
<a name="l00110"></a>00110     <span class="keywordflow">if</span> (*p == 0) 
<a name="l00111"></a>00111     {
<a name="l00112"></a>00112       <span class="comment">//OSCWarning("Unterminated [ in pattern \".../%s/...\"", theWholePattern);</span>
<a name="l00113"></a>00113       <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00114"></a>00114     }
<a name="l00115"></a>00115     <span class="keywordflow">if</span> (p[1] == <span class="charliteral">'-'</span> &amp;&amp; p[2] != 0) 
<a name="l00116"></a>00116     {
<a name="l00117"></a>00117       <span class="keywordflow">if</span> (test[0] &gt;= p[0] &amp;&amp; test[0] &lt;= p[2]) 
<a name="l00118"></a>00118       {
<a name="l00119"></a>00119         result = !negated;
<a name="l00120"></a>00120         <span class="keywordflow">goto</span> advance;
<a name="l00121"></a>00121       }
<a name="l00122"></a>00122     }
<a name="l00123"></a>00123     <span class="keywordflow">if</span> (p[0] == test[0]) 
<a name="l00124"></a>00124     {
<a name="l00125"></a>00125       result = !negated;
<a name="l00126"></a>00126       <span class="keywordflow">goto</span> advance;
<a name="l00127"></a>00127     }
<a name="l00128"></a>00128     p++;
<a name="l00129"></a>00129   }
<a name="l00130"></a>00130 
<a name="l00131"></a>00131   result = negated;
<a name="l00132"></a>00132 
<a name="l00133"></a>00133 advance:
<a name="l00134"></a>00134 
<a name="l00135"></a>00135   <span class="keywordflow">if</span> (!result)
<a name="l00136"></a>00136     <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00137"></a>00137 
<a name="l00138"></a>00138   <span class="keywordflow">while</span> (*p != <span class="charliteral">']'</span>) 
<a name="l00139"></a>00139   {
<a name="l00140"></a>00140     <span class="keywordflow">if</span> (*p == 0) 
<a name="l00141"></a>00141     {
<a name="l00142"></a>00142       <span class="comment">//OSCWarning("Unterminated [ in pattern \".../%s/...\"", theWholePattern);</span>
<a name="l00143"></a>00143       <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00144"></a>00144     }
<a name="l00145"></a>00145     p++;
<a name="l00146"></a>00146   }
<a name="l00147"></a>00147 
<a name="l00148"></a>00148   <span class="keywordflow">return</span> Osc_PatternMatch(p+1,test+1);
<a name="l00149"></a>00149 }
<a name="l00150"></a>00150 
<a name="l00151"></a>00151 <span class="keyword">static</span> <span class="keywordtype">bool</span> MatchList (<span class="keyword">const</span> <span class="keywordtype">char</span> *pattern, <span class="keyword">const</span> <span class="keywordtype">char</span> *test) 
<a name="l00152"></a>00152 {
<a name="l00153"></a>00153 
<a name="l00154"></a>00154  <span class="keyword">const</span> <span class="keywordtype">char</span> *restOfPattern, *tp = test;
<a name="l00155"></a>00155 
<a name="l00156"></a>00156  <span class="keywordflow">for</span>(restOfPattern = pattern; *restOfPattern != <span class="charliteral">'}'</span>; restOfPattern++) 
<a name="l00157"></a>00157  {
<a name="l00158"></a>00158    <span class="keywordflow">if</span> (*restOfPattern == 0) 
<a name="l00159"></a>00159    {
<a name="l00160"></a>00160      <span class="comment">//OSCWarning("Unterminated { in pattern \".../%s/...\"", theWholePattern);</span>
<a name="l00161"></a>00161      <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00162"></a>00162    }
<a name="l00163"></a>00163  }
<a name="l00164"></a>00164 
<a name="l00165"></a>00165  restOfPattern++; <span class="comment">/* skip close curly brace */</span>
<a name="l00166"></a>00166 
<a name="l00167"></a>00167  pattern++; <span class="comment">/* skip open curly brace */</span>
<a name="l00168"></a>00168 
<a name="l00169"></a>00169  <span class="keywordflow">while</span> (1) 
<a name="l00170"></a>00170  {  
<a name="l00171"></a>00171    <span class="keywordflow">if</span> (*pattern == <span class="charliteral">','</span>) 
<a name="l00172"></a>00172    {
<a name="l00173"></a>00173      <span class="keywordflow">if</span> (Osc_PatternMatch(restOfPattern, tp)) 
<a name="l00174"></a>00174        <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00175"></a>00175      <span class="keywordflow">else</span> 
<a name="l00176"></a>00176      {
<a name="l00177"></a>00177        tp = test;
<a name="l00178"></a>00178        ++pattern;
<a name="l00179"></a>00179      }
<a name="l00180"></a>00180    } 
<a name="l00181"></a>00181    <span class="keywordflow">else</span> 
<a name="l00182"></a>00182    {
<a name="l00183"></a>00183      <span class="keywordflow">if</span> (*pattern == <span class="charliteral">'}'</span>)
<a name="l00184"></a>00184        <span class="keywordflow">return</span> Osc_PatternMatch(restOfPattern, tp);
<a name="l00185"></a>00185      <span class="keywordflow">else</span> 
<a name="l00186"></a>00186      {
<a name="l00187"></a>00187        <span class="keywordflow">if</span> (*pattern == *tp) 
<a name="l00188"></a>00188        {
<a name="l00189"></a>00189          ++pattern;
<a name="l00190"></a>00190          ++tp;
<a name="l00191"></a>00191        } 
<a name="l00192"></a>00192        <span class="keywordflow">else</span> 
<a name="l00193"></a>00193        {
<a name="l00194"></a>00194          tp = test;
<a name="l00195"></a>00195          <span class="keywordflow">while</span> (*pattern != <span class="charliteral">','</span> &amp;&amp; *pattern != <span class="charliteral">'}'</span>) {
<a name="l00196"></a>00196            pattern++;
<a name="l00197"></a>00197        }
<a name="l00198"></a>00198        <span class="keywordflow">if</span> (*pattern == <span class="charliteral">','</span>) 
<a name="l00199"></a>00199          pattern++;
<a name="l00200"></a>00200       }
<a name="l00201"></a>00201      }
<a name="l00202"></a>00202    }
<a name="l00203"></a>00203  }
<a name="l00204"></a>00204 }
<a name="l00205"></a>00205 
<a name="l00206"></a>00206 
<a name="l00207"></a>00207 
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